Display screen with a transitional graphical user interface



FIG. 1 is a front view of a display screen with a transitional graphical user interface showing the new design in a first state;

FIG. 2 is a front view thereof showing the new design in a second state; and,

FIG. 3 is a front view thereof showing the new design in a third state.

The broken lines showing a display screen illustrate environment and form no part of the claimed design. All other broken lines illustrate portions of the transitional graphical user interface that form no part of the claimed design. The closely spaced parallel diagnoal shading lines indicate translucency and are not intended to indicate surface ornamentation.

The subject matter in this patent includes a process or period in which an image changes into another image. This process or period forms no part of the claimed design. 

CLAIM The ornamental design for a display screen with a transitional graphical user interface, as shown and described. 